Hydrogen peroxide (H2O2) decomposes into water (H2O) and oxygen gas (O2). Hydrogen peroxide is a liquid that is stored in dark-colored bottles in a cool location. Which of these is the MOST likely reason for storing hydrogen peroxide in
this way?

A. Hydrogen peroxide forms crystals when warmed.

B. Exposure to light allows bacteria to grow in hydrogen peroxide.

C. Exposure to light promotes the formation of hydrogen gas (H2) instead of oxygen gas.

D. Hydrogen peroxide breaks down quickly when exposed to light.

Answer:

equal numbers of protons and neutrons

Answer:

Explanation:

The same. The force down (the weight of the barbells) is counter balanced by the weight up ( a person holding the barbells). A little later on, you are going to draw force diagrams showing that these two forces are drawn acting in opposite directions.

You can satisfy yourself by drawing a box and putting 1 arrow pointing up on the bottom and labeling it 756 up and another arrow on the top of the box pointing down and labeling it 756. They balance.

Answer:Effect of Catalysts on the Activation Energy. Catalysts provide a new reaction pathway in which a lower Activation energy is offered. A catalyst increases the rate of a reaction by lowering the activation energy so that more reactant molecules collide with enough energy to surmount the smaller energy barrier.

Explanation:

Your answer is in this

In a chemical equation which shows presence of catalyst, activation energy is altered.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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Answer:To calculate the molar mass, first calculate the number of moles of gas using the ideal gas equation. 1 atm. 750 mmHg. (1.00 L). 760 mmHg. 0.0306 mol. L atm.

Explanation:

Answer:

Chemistry

Explanation:

Chemistry helps connect the types of physcial sciences.

Answer:

V = 0.24 L.

Explanation:

Hello there!

In this case, it is possible to approach this problem by using the ideal gas equation defined by:

[tex]PV=nRT[/tex]

Whereas our unknown is V, volume, and we solve for it as follows:

[tex]V=\frac{nRT}{P}[/tex]

Then since the STP conditions are ate 273.15 K and 1 atm, the volume of 0.011 moles of CO2 gas turns out to be:

[tex]V=\frac{0.011mol*0.08206\frac{atm*L}{mol*K}*273.15K}{1atm}\\\\V=0.24L[/tex]

Regards!

Answer:

whick level are u on

I am not faking an answer but I cann arrange it to u if possible

Explanation:

20984Po→20582Pb+42α

4520Ca→4521Sc+0-1e+00ν

Explanation:

The alpha decay of polonum-209, which consists of the emission of an alpha particle, will leave behind the atom of a different element.

Notice that the identity of the element changes after the decay. This means that you're dealing with a nuclear transmutation, a process that converts an atom of a given element into an atom of a different element.

Answer:

17000 joules.

Explanation:

Explanation:

With knowledge of the specific heat capacity of a substance, its mass, and the temperature change, we can convert this to the energy required for this temperature change using:

ΔH=mCΔT, where

ΔH=change in enthalpy (J)

m= mass of substance being heated (g) i.e. water in this question

C= specific heat capacity (J/g°C)

ΔT= change in temperature (°C)

We know mass=65g and ΔT=76°C−12°C=64°C

The specific heat capacity of water is 4.18J/g°C

Therefore, ΔH=65g⋅4.18Jg°C⋅64°C

=17388.8J

=17000J (2 significant figures)

Answer: The mass of manganese(III) oxide produced is 113.03 g

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)

Given mass of zinc = 46.8 g

Molar mass of zinc = 65.38 g/mol

Plugging values in equation 1:

[tex]\text{Moles of zinc}=\frac{46.8g}{65.38g/mol}=0.716 mol[/tex]

The given chemical equation follows:

[tex]Zn+2MnO_2+H_2O\rightarrow Zn(OH)_2+Mn_2O_3[/tex]

By the stoichiometry of the reaction:

If 1 mole of zinc produces 1 mole of manganese(III) oxide

So, 0.716 moles of zinc will produce = [tex]\frac{1}{1}\times 0.716=0.716mol[/tex] of manganese(III) oxide

Molar mass of manganese(III) oxide = 157.87 g/mol

Plugging values in equation 1:

[tex]\text{Mass of manganese(III) oxide}=(0.716mol\times 157.87g/mol)=113.03g[/tex]

Hence, the mass of manganese(III) oxide produced is 113.03 g

Answer:

1.06 × 10^5 J

Explanation:

We have to use the formula;

log(k2/k1) = Ea/2.303 ×R (1/T1 - 1/T2)

Given that;

k1 = 1.10 × 10-4 s-1

k2= 1.02 × 10-3 s-1

Ea=?

R=8.314 Jmol-1K-1

T1= 470. °C

T2= 510. °C

Hence;

log(1.02 × 10-3 s-1/1.10 × 10-4 =Ea/2.303 ×8.314(1/470 -1/510)

0.9672 = Ea/19.122(2.13 - 1.96) × 10^-3

0.9672= Ea/19.122(0.17) × 10^-3

0.9672= 1.7 ×10^-4 Ea/19.122

19.122 × 0.9672 = 1.74 × 10^-4Ea

Ea= 19.122 × 0.9672/1.74 × 10^-4

Ea= 18.495/1.74 × 10^-4

Ea= 1.06 × 10^5 J

Answer:

3.01 × 10^24 atoms of vitamin D

Explanation:

The number of atoms, molecules or ions present in a substance is given by the Avogadro's number which is 6.02 × 10^23.

Hence;

1 molecule of vitamin D contains 6.02 ×10^23 atoms

5 molecules of vitamin D contains 5 × 6.02 ×10^23/1

= 3.01 × 10^24 atoms of vitamin D

Answer:

The Lewis dot structure is not correct

Explanation:

Each atom ought to be surrounded by eight electrons or two electrons according to the octet rule. We now need to closely examine the structure to see if it fits into this description.

All the atoms in the molecule have the correct valence except the hydrogen which is directly attached to the oxygen.

The positive charge ought to mean that more than two bonds were formed between hydrogen and oxygen which is clearly not the case here.

Thus, the hydrogen atom attached directly to oxygen does not display the correct valence.

Answer:

fractionao distillation of two colourless liquids

Answer: The correct option is b) 1 and 4.

Explanation:

An ionic compound is formed when a complete transfer of electrons takes place from one element (usually metals) to another element (usually non-metals).

The element (metal) that loses electrons forms a positive ion which is known as cation while the element (non-metal) that gains electrons forms a negative ion which is known as an anion.

Sodium chloride is an ionic compound that is formed by the combination of sodium and chloride ions.

Sodium is the 11th element of periodic table having electronic configuration of [tex]1s^22s^22p^63s^1[/tex]

It will lose 1 electron to form a positive in having a chemical formula of [tex]Na^+[/tex]

Therefore, the statements that say, sodium atoms form positive ions and sodium atoms will lose electrons are correct.

Thus, the correct option is b) 1 and 4.

Answer:

penicillin could protect mice against infection from deadly Streptococci.

Explanation:

Answer:

In 1940, Florey carried out vital experiments, showing that penicillin could protect mice against infection from deadly Streptococci.

Answer:

c

Explanation:

The molarity of the HCl solution is 5M and the correct option is option C.

Molarity is a unit of concentration measuring the number of moles of a solute per litre of solution.

Chemists primarily need the concentration of solutions to be expressed in a way that accounts for the number of particles that react according to a particular chemical equation. Since percentage measurements are based on either mass or volume, they are generally not useful for chemical reactions. A concentration unit based on moles is preferable.

Given,

Volume of NaOH = 50 ml

Concentration of NaOH = 1M

Volume of HCl = 10ml

Concentration of NaOH × Volume of NaOH = Concentration of HCl × Volume of HCl

1 × 50 = c × 10

Concentration of HCl = 5 M.

Therefore, the molarity of the HCl solution is 5M and the correct option is option C.

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Answer:

A

Explanation:

because ionic bond have stronger electrostatic force of attraction between oppositely  charged particles so it has higher boiling point than molecular which is covalent bond and have low boiling point hope this helps to understand ^_^

Answer:

b

Explanation:

because it has gained an electron

[tex]F^-[/tex] ion is in a higher oxidation state than its normal ion. Hence, option B is correct.

An oxidation state is a number given to the atom of an element when participating in a chemical reaction.

The atoms of elements are not always neutral i.e. carry no charge. They sometimes carry either positive or negative charges to become ions.

[tex]F^-[/tex] is in a higher oxidation state than its normal ion because it has gained an electron.

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Answer:

carboxyl group you said "functional group" not homologous series!

Answer:

Option "B":"Carboxyl group"

Explanation:

An insect needs mud wallows to breed; that insect pollinates several flowers in that ecosystem.

Having mud in an ecosystem is important because Insects are very important as primary or secondary decomposers in the ecosystem. These insects need mud wallows to breed. That insect pollinates several flowers in that ecosystem.

Therefore, the mud in an ecosystem is most important as it provides a place for insects to breed and these insects play a major role in the ecosystem like pollination.

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Answer:

Every science experiment should follow the basic principles of proper investigation so that the results presented at the end are seen as credible.

Observation and Hypothesis. ...

Prediction and Modeling. ...

Testing and Error Estimation. ...

Result Gathering and Presentation. ...

Conclusions. ...

Law Formation.

Answer:

convection within Earth’s interior

Explanation:

Complete question

Name this event

Solution

During the convection within Earth’s interior , the earth's core undergo convection leading to turbulent dynamic that further leads to changing of magnetic field.

Due to movement of core material, there is interaction between the  mantle convection and plate motions.

Answer:

454

Explanation:

j

Answer:

This is my favorite topic to address. Do you think the Genesis story and Big Bang Theory support one another? Why or why not?

No, the Genesis story and the Big Bang Theory support one another. I'll explain why, God has the power to do the marvelous, the everything that seems impossible to human eyes. Scientist say there was an explosion that originated the universe. That is possible. However, it must have been a controlled explosion.

"Awake 1996 The Awesome Universe  What the Big Bang Explains—What It Doesn’t":

What the Big Bang “Explains”: The most popular version of creation says that about 15 to 20 billion years ago, the universe didn't exist. There was no time, no matter—nothing except an infinitely small point called a singularity, which exploded into the present universe. During the first few minutes of the big bang, nuclear fusion took place on a universal scale. After that it gave rise to the currently "measured concentrations of hydrogen and helium" and part of the lithium in "interstellar space". After around "300,000 years, the universe wide fireball dropped to a little below the temperature of the surface of the sun, allowing electrons to settle into orbits around atoms and releasing a flash of photons, or light."

Questions the Big Bang Does Not Answer: "As the report goes on to note, “other data indicate that certain stars are at least 14 billion years old".

"Still another problem for the big bang has come from evidence of “bubbles” in the universe that are 100 million light-years in size, with galaxies on the outside and voids inside. Margaret Geller, John Huchra, and others at the Harvard-Smithsonian Center for Astrophysics have found what they call a great wall of galaxies some 500 million light-years in length across the northern sky. Another group of astronomers, who became known as the Seven Samurai, have found evidence of a different cosmic conglomeration, which they call the Great Attractor, located near the southern constellations of Hydra and Centaurus. Astronomers Marc Postman and Tod Lauer believe something even bigger must lie beyond the constellation Orion, causing hundreds of galaxies, including ours, to stream in that direction like rafts on a sort of “river in space.”  Also, "Cosmologists say the blast from the big bang was extremely smooth and uniform, according to the background radiation it allegedly left behind. How could such a smooth start have led to such massive and complex structures? “The latest crop of walls and attractors intensifies the mystery of how so much structure could have formed within the 15-billion-year age of the universe,” admits Scientific American—a problem that only gets worse as Freedman and others roll back the estimated age of the cosmos still more."

Do the parallels between the Big Bang/Evolution and the Genesis Creation story strengthen your belief in the idea that God created everything? Why or why not?

Romans 1:20 states: "For his invisible qualities are clearly seen from the world’s creation onward, because they are perceived by the things made, even his eternal power and Godship, so that they are inexcusable." The book "Draw close to Jehovah" further states: "Just think of the blinding flashes and rumbling booms of a thunderstorm, the glorious cascade of a mighty waterfall, the overwhelming vastness of a starry sky! Do you not see the power of God in such displays? Yet, few in today’s world truly recognize God’s power.  Still fewer view it properly. Understanding this divine attribute, though, gives us many reasons for drawing closer to Jehovah."

Based on the book: "Draw Close to Jehovah" it say's: "We do not need to witness a miracle to discern that God possesses this attribute (power). It is readily apparent. The Bible tells us that creation gives proof of Jehovah’s “eternal power and Godship.” Based on the magazine: "Awake 1996 The Awesome Universe  What the Big Bang Explains—What It Doesn’t" states that "EVERY morning is a miracle." And its true! Deep inside the morning sun, hydrogen is being fused into helium at high temperatures that are at million degrees. X rays and gamma rays pour out "of the core into the surrounding layers of the sun." If the sun was transparent, "the rays would blast their way to the surface in a few seconds. Instead, they begin to bounce from tightly packed atom to atom of solar “insulation,” gradually losing energy." Days, weeks, centuries, pass. Thousands of years later, that once deadly radiation finally emerges from the sun’s surface as a gentle shower of yellow light—no longer a menace but just right for bathing earth with its warmth.

Answer:

10 electrons

Explanation:

Answer:

B)  Consumer COnsumer COnsumer

Answer:

Consumer

Explanation:

It is a consumer